u need to friggin test ur script

when you try to add an item, it asks for item, data, then asks for item and data again

also, you should disable the - in the items until you click an item

when you remove stuff, i think that this would come in handy:

echo $$?!=\"Are you sure you would like to remove $did(name,id).seltext $+ ?)\"
if ($! == $true) {
  do remove stuff...
}